This ferrite ring magnet weighs 1149g and has a pull force of 8.1 kg. GradeY30BH. It is uncoated and has an outside diameter of 145mm, and inside diameter of 75mm and is 20mm thick. Its direction of magnetization is through height.  

This ferrite loudspeaker magnet is one of our 'big boys', and it plays an important role in the realm of sound. Ferrite ring magnets are a crucial component in the functioning of a loudspeaker by creating a magnetic field for converting electrical signals into sound. The ferrite ring magnet is a specialized magnet, integral to the speaker's performance. Its role is to create a stable magnetic field that interacts with the voice coil, converting electrical signals into mechanical vibrations that produce sound. The specific dimensions and magnetic characteristics of this magnet, one of our largest, make it powerful and highly efficient in this role. Its Y30BH grade indicates a high-quality ferrite material that provides strong and consistent magnetic fields necessary for high-fidelity audio reproduction. 

The uncoated nature of the magnet helps in maintaining the raw magnetic properties without interference from coatings. The direction of magnetisation through the height of the magnet means the magnetic field is aligned with the voice coil, which means great clarity in the sound produced. The ferrite ring magnet can securely interact with the other components of the speaker without dislodging, even under high-frequency vibrations.  

Beyond loudspeakers, this ferrite ring magnet's dimensions and properties make it useful in other applications requiring stable and precise magnetic fields. It can be used in magnetic resonance imaging (MRI) devices, sensors and various electronic devices that rely on consistent magnetic performance. Ferrite magnets are durable and reliable, with a high resistance to de-magnetization and corrosion, which makes this ring magnet suitable for long-term applications in both consumer products and industrial devices.